evdev: prevent unterminated device name
evdev: prevent unterminated device name

The kernel copies up to sizeof(devname) bytes but doesn't null-terminate the
string if the device name exceeds the size of the supplied buffer.

Tarnyko/weston-xdg_surface_present,eyolfson/weston,sir-murray/weston,kwm81/weston,kwm81/weston,giucam/weston,Tarnyko/weston-xdg_surface_present,Gnurou/weston,Fantu/compositor-spice,krezovic/weston,jonnylamb/weston,Fantu/compositor-spice,mchalupa/weston,Fantu/compositor-spice,giucam/weston,sir-murray/weston,udoprog/weston,udoprog/weston,xorgy/weston,krezovic/weston,jonnylamb/weston,mchalupa/weston,eyolfson/weston,Gnurou/weston,xorgy/weston